What if...Spider-Gwen was in the MCU?

Endgame

And then I woke up. I was lying on the ground, and felt a strange, tickling sensation as I was pulled back from dust. I looked over, and saw Peter, also lying on the ground, turning back from dust. I stood up, and ran over to him, helping him up when he unexpectedly pulled me into a hug, "We're alright they did it, everyone's back!"

I returned the hug, "We're alright!" We broke away, and saw Strange with his head through a portal, talking to someone on the other side.

"...yes, send them to Wakanda and New Asgard, yeah, those are all I can think of, aside from ours. OK, I'll check." He turned to Quill, "Do you guys have any space armies?"

"Yeah, the ravagers, check Contraxia, they can all band together from there. There also might be some Nova Corps remnants, if you can find them. I think they were destroyed with Xander, though."

Strange stuck his head back through the portal and relayed the information. About five minutes later, he pulled his head back out, closed the portal, and called us to circle up, "It's been five years. We need to get to earth, to help fight Thanos."

"Wait, didn't we already fight him? And he wiped the floor with us."

"Well, yes, but the Avengers killed him."

"Then why do we have to help them fight him?"

"Because he came back-"

"Zombie Thanos?"

"No, from the past. This is the Thanos before he started gathering all the stones."

"Wait, so Thanos came...back to the future?"

"Remember what Tony said about the pop culture references?"

"When do we need to go to earth?"

"Now."

Strange walked over to the other side of the rubble, and opened a portal, the guardians followed him, and Peter and I swung over the rubble, landing in crouches. There were armies from Asgard, Wakanda, wizards like Strange, the ravagers that Quill talked about, and more.

Mjölnir came flying across the battlefield, where there were even more of Thanos' army lined up across from us, Chitauri, leviathans, and more of the space doughnut ships.

Cap caught Mjölnir, "AVENGERS! Assemble!" And we charged into battle as a team.

KAREN spoke up inside my mask, "Welcome back, Miss Stacy. Would you like me to activate instant kill?"

"I have instant kill in this suit? Absolutely, lets kill some aliens!" Four silver arms extended from my back, and started stabbing the aliens. I turned invisible, ran through a group of aliens, stabbing them, phasing through them, my adrenaline pumping.

I crashed into Iron Man, quite literally. He grabbed my arm, "Steady, Stacy." Peter flipped down next to us and started rambling. "Hey! Holy cow! You will not believe what's been going on. Do you remember when we were in space? And we got all dusty? I must've passed out, because I woke up, and you were gone. But Doctor Strange was there, right? He was like, 'It's been five years. Come on, they need us.' And then he started doing the yellow sparkly thing that he does all the time–"

"He did?"

"What are you doing?" Stark gave him a hug, and Peter hugged back, "Oh, this is nice."

A horn blared, interrupting their reunion, playing La Cucaracha. "Anyone see an ugly brown van?" Scott asked.

"Yes! But you're not gonna like where it's parked!"

"Scott, how long you need to get that thing working?"